Stop for furnace-doors.



L. 0, WEST. STOP-FOR FURNACE DOORS. APPLICATION HLED lUNE 29. 19W-Patent-ed May 21, 918.

LEONIDAS D. WEST, OF DENVER, COLORADO.

STOP r03 romance-nouns.

Specification of Letters Patent.

Patented May 231, 1918.

Application filed June 29, 1917. Serial No. 177,823.

To allwiwm it may concern:

Be it known that I, LEoNIDAs D. lVnsr, a citizen of the United States,residing at Denver, in the county of Denver and State of Colorado, haveinvented certain new and useful Improvements in Stops for F urnace-Doors; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention has for its principal object to provide a stop to prevententire closing of-furnace doors, after coaling, means being providedwhereby the stop is automatically set by opening of the door, thusinsuring that the fireman shall not neglect leaving the door open asuitable length of time to admit sufficient air to prevent smoking.

A further object is to mount the stop on a damper which is opened uponopening of the coaling door, whereby a single operating means may beprovided for both parts.

A still further object is to so construct the device so as to render iteasy to manufacture and thus marketable at small cost.

With the foregoing general objects in view, the invention resides in thenovel features of construction and unique combination of parts to behereinafter fully described and claimed, the descriptive matter beingsupplemented by the accompanying drawing which constitutes a part ofthis specification and in which:

Figure 1 is an elevation of a furnace door showing the application ofthe invention.

Fig. 2 is an edge view of the parts illustrated in Fig. 1, showing thenormal positions thereof.

Fig. 3 is a vertical section showin the relative positions of partsafter the oor has been closed to the predetermined extent after coalingand Fig. 4 is a horizontal section on the line H of Fig. 3.

In the drawing above briefly described the numeral 1 designates a commontype of furnace coaling door which is hingedly mounted in the usualmanner, the inner side of said door being provided with a perforatedbuffer 2, the space 3 between said buffer and the door constituting anair heating chamber into which an air inlet neck 4: discharges, saidneck being mounted on the door and having at its outer end a pivoteddamper 5 which is formed with a plurality of perforations 5 which serveto admit a small quantity of air at all times.

Depending from the damper 5, is a link 6 whose lower end is connectedwith a combined operating member and latch 7 pivotally mounted on thedoor 1, a pivoted handle 8 being provided immediately below saidcombined operating member and latch for opening the door and at the sametime for actuating said member to open the damper 5. The handle 8 in thepresent showing, is provided with a .cam 9 which cooperates with themember 7 for not only operating said member to open the damper 5, butfor holding said member so as to retain the damper in open positionuntil released. It is thus insured that whenever the door is opened forsupplying coal to the fire box, the fireman cannot neglect to open thedamper 5, and thus when the door is again closed a quantity of air willbe admitted through the neck 4 to assist in'burning the volatilematerials before they escape in the form of smoke.

In most cases it is necessary to admit more air than that passingthrough the neck 4 and for this purpose, I provide a stop 10 whichlimits the closing movement of the door "to permit additional air toenter the fire box around the same. The stop 10 is carried on the samepivot as, and moves bodily with the damper 5, the stop being thus set asshown in Fig. 3 when the handle 8 is operated for opening the door. Itwill thus be obvious that when the fireman closes the door, aftercoaling, the closing movement will be limited by the stop 10 until thisstop is moved to inoperative position at the end of a predetermined timeby releasing the member 7. When this is done, the damper 5 drops bygravity to cut off the inrush of air through the neck 4, andsimultaneously the stop 10 is retracted.

In order that the stop may be properly set for holding the door open therequired amount for producing best results, said stop is preferablyadjustable being held in any, adjusted position by a' set screw or thelike 11.

From the foregoing, taken in connection with the accompanying drawing,it will be obvious that although the device is of comparatively simpleand inexpensive construction it will be highly efficient for thepurposes intended. Since probably the best results .are obtained. fromethe specifi Q struction shown and described, such constructionconstitutes the preferred form of the device. I wish it understood,however, that within the scope of the invention as claimed numerousminor changes may well be ,made without sacrificing the principaladvantages.

I claim:

1. The combination with a furnace door, of a movable handle for openingsaid door, a stop for arresting the'closin'g movement of-said doorwithout manual-attentionwhen the" door-nears its: closed position, and-connectingmeans between said handleandstop for moving the :lattertooperativeposition when the-"former is operated to open the doorandforholding said stop-in said'operative position until released.

-2. The combination'wit-h a furnace door, of an aininlet neck therefor,a pivoted damper for said neck, a movable-handle for said door,connecting--means betweensaid handle and damperfor-openingsaid damperwhen said handl is .eperate t 0129 the door, said connecting meanshaving means for holding the damper open until released, and a door stopcarried by said damper to prevent entire closing of the door while saiddamper remains in open position.

3. The combination with a furnacedoor, and a stop mounted pivotally onsaid door for preventing entire closing thereof after coaling, astop-actuating member pivoted to said door, a link pivotedgto saidsstop.and said member for disposing the former .tooperative position when saidmember is.-operated, ai-handle pivoted to thedoor and having a cam .foroperating said member, and acam-latching shoulder onsaid memberforen-gagement with the send. of said camwhen the latter has performedits Work, to preventtreturn of the partsto ,no-rmal positions untilsaidcam .and shoulder are manually disengaged.

In testimony whereof I: have hereunto .set

my hand.

LEONIDAS D.

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Washington, D. 0.

